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Product Overview
The 6EP1437-3BA00 is Siemens’ SITOP Modular three-phase regulated DIN-rail power supply, rated 24 V DC at 40 A (960 W continuous) from a 3AC 400–500 V mains input, and it sits at the heavy-duty end of the SITOP Modular lineup alongside the 10 A (6EP1434) and 20 A (6EP1436) siblings. Where a single-phase SITOP Smart might struggle with a cabinet full of SIMATIC S7-1500 I/O, ET 200 distributed blocks, and a couple of servo drives drawing from the same 24 V rail, the 6EP1437-3BA00 steps in with 90 % efficiency at full load, a wide-input range of 320–550 V AC (full power above ~340 V), and a 120 A short-term overload capability that lets it clear a sticky downstream fuse without collapsing the 24 V bus. The module is housed in a 240 × 125 × 125 mm ventilated enclosure, DIN-rail mounted (EN 60715 35 mm), screw-terminated on both the 3AC L1/L2/L3/PE input side (0.2–4 mm²) and the dual 24 V + / – output clamps (0.33–10 mm²), and weighs in around 3.2 kg—substantial, but that mass buys you the thermal inertia and the convection surface area that lets the unit run 0…+70 °C without a fan.Importantly for 2025-era procurement, Siemens has moved the 6EP1437-3BA00 to “Phase-Out Announced” status in the SITOP Modular family, with the designated successor being the 6EP3437-8SB00-0AY0 (SITOP PSU300M 24 V / 40 A). That phase-out posture is exactly why the 6EP1437-3BA00 still turns up in urgent spare-part RFQs: plants that standardized on the Modular form factor a decade ago don’t want to revalidate a PSU300M swap on a live line if the 40 A rail is feeding safety-rated I/O and servo brakes. A conformal-coated variant (6EP1437-3BA00-8AA0) exists for dusty or condensing environments, sharing the same electrical DNA as the base -3BA00 but with the lacquer that keeps flux-creep and humidity trips away. For brownfield SITOP Modular fleets—food & beverage skids, water-treatment MCC/PLC combos, automotive body-shop conveyors, paper-machine drive cabinets—the 6EP1437-3BA00 remains the “don’t touch it if it works, stock two if you can” spare.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | 6EP1437-3BA00 |
| Manufacturer | Siemens |
| Product Type | Regulated Three-Phase DIN-Rail Power Supply (SITOP Modular) |
| Input Voltage (rated) | 3AC 400–500 V, 47–63 Hz |
| Input Range | 320–550 V AC (full power ≥ 340 V) |
| Input Current @ 400 V | 2.2 A |
| Output Voltage (rated) | 24 V DC |
| Output Adjust Range | 24–28.8 V DC (potentiometer, compensates line drop) |
| Output Current | 40 A continuous (960 W) |
| Short-Term Overload | 120 A (selective fuse clearing) |
| Constant Short-Circuit Current | ~46 A (constant-current or latch-off) |
| Ripple / Noise | ≤ 100 mV pp (≤ 200 mV pk, 20 MHz BW) |
| Efficiency @ Full Load | ~90 % |
| Hold-Up Time @ 400 V | ≥ 6 ms |
| Parallel Capability | Up to 2 units (for power boost or redundancy) |
| Derating | 2 %/K above +60 °C; @ +70 °C → 5 A |
| Protection Rating | IP20 (cabinet use) |
| Dimensions (W × H × D) | 240 × 125 × 125 mm |
| Weight | ~3.2 kg |
| Approvals | CE, UL 508, CSA, SEMI F47, ATEX II 3G |
